内部类

内部类分为：

1.成员内部类

2.静态内部类

3.局部内部类

4.匿名内部类

 

package com.yongsheng.oop.Demo10;

public class Outer {
    private int id = 10;

    public void out(){
        System.out.println("外部类");
    }

    //成员内部类
    class Inner {
        public void in(){
            System.out.println("内部类");
        }
        public void getId(){
            System.out.println(id);
        }
        public void getOut(){
            out();
        }
    }

    //静态内部类
    static class Inner1 {
        public static void getId(){
           int id = new Outer().id;
            System.out.println(id);
        }
    }

    //局部内部类
    public void method(){
        class Inner2{

        }
    }
}

package com.yongsheng.oop.Demo10;

public class Application {

    public static void main(String[] args) {
        Outer outer = new Outer();
        Outer.Inner inner = outer.new Inner();
        inner.getId();
        inner.getOut();
        Outer.Inner1.getId();
    }
}